v3.25.2
Shareholder Report, Holdings (Details)
Jul. 31, 2025
C000018365 | Natixis S.A.8772960  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018365 | U.S. Treasury Bills8773026  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018365 | U.S. Treasury Bills8773005  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000018365 | U.S. Treasury Bills8773000  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000018365 | Barclays Bank8772921  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000018365 | Mizuho Securities8772953  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000018365 | MUFG Securities Americas8772956  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000018365 | Citigroup Global Markets8772933  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000018365 | U.S. Treasury Bills8773023  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000018365 | BNP Paribas8772925  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000018365 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000018365 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 28.20%
C000018365 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 53.40%
C000162326 | Natixis S.A.8772960  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000162326 | U.S. Treasury Bills8773026  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000162326 | U.S. Treasury Bills8773005  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000162326 | U.S. Treasury Bills8773000  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000162326 | Barclays Bank8772921  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000162326 | Mizuho Securities8772953  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000162326 | MUFG Securities Americas8772956  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000162326 | Citigroup Global Markets8772933  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000162326 | U.S. Treasury Bills8773023  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000162326 | BNP Paribas8772925  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000162326 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000162326 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 28.20%
C000162326 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 53.40%
C000240469 | Natixis S.A.8772960  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000240469 | U.S. Treasury Bills8773026  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000240469 | U.S. Treasury Bills8773005  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000240469 | U.S. Treasury Bills8773000  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000240469 | Barclays Bank8772921  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000240469 | Mizuho Securities8772953  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000240469 | MUFG Securities Americas8772956  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000240469 | Citigroup Global Markets8772933  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000240469 | U.S. Treasury Bills8773023  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000240469 | BNP Paribas8772925  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000240469 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000240469 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 28.20%
C000240469 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 53.40%
C000018374 | FFCB8772530  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000018374 | U.S. Treasury Bills8772298  
Holdings [Line Items]  
Percent of Total Investments 5.70%
C000018374 | U.S. Treasury Bills8772283  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000018374 | U.S. Treasury Bills8772287  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000018374 | U.S. Treasury Bills8772296  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000018374 | FHLB8772482  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000018374 | U.S. Treasury Bills8772286  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000018374 | U.S. Treasury Notes8772569  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018374 | FFCB8772527  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018374 | FFCB8772533  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018374 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 41.30%
C000018374 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 60.00%
C000018368 | U.S. Treasury Bills8773028  
Holdings [Line Items]  
Percent of Total Investments 12.70%
C000018368 | U.S. Treasury Bills8773022  
Holdings [Line Items]  
Percent of Total Investments 10.20%
C000018368 | U.S. Treasury Bills8773037  
Holdings [Line Items]  
Percent of Total Investments 9.60%
C000018368 | U.S. Treasury Bills8773025  
Holdings [Line Items]  
Percent of Total Investments 5.70%
C000018368 | U.S. Treasury Bills8773016  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000018368 | U.S. Treasury Bill - When Issued8773039  
Holdings [Line Items]  
Percent of Total Investments 5.20%
C000018368 | U.S. Treasury Bills8773019  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000018368 | U.S. Treasury Notes8772940  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000018368 | U.S. Treasury Bills8773031  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000018368 | U.S. Treasury Bills8773064  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000018368 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 100.80%
C000022551 | U.S. Treasury Notes8774104  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000022551 | U.S. Treasury Notes8774098  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000022551 | U.S. Treasury Bill - When Issued8774121  
Holdings [Line Items]  
Percent of Total Investments 2.30%
C000022551 | U.S. Treasury Notes8774095  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000022551 | U.S. Treasury Notes8774101  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000022551 | U.S. Treasury Notes8774107  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000022551 | Truist Bank8774399  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000022551 | Golden Credit Card Trust8774602  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000022551 | JPMorgan Chase8774234  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000022551 | Morgan Stanley8774254  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000022551 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000022551 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000022551 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000022551 | Municipal Bond  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000022551 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
C000022551 | Asset-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 31.00%
C000022551 | Corporate Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 34.00%
C000158211 | U.S. Treasury Notes8774104  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000158211 | U.S. Treasury Notes8774098  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000158211 | U.S. Treasury Bill - When Issued8774121  
Holdings [Line Items]  
Percent of Total Investments 2.30%
C000158211 | U.S. Treasury Notes8774095  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000158211 | U.S. Treasury Notes8774101  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000158211 | U.S. Treasury Notes8774107  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000158211 | Truist Bank8774399  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000158211 | Golden Credit Card Trust8774602  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000158211 | JPMorgan Chase8774234  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000158211 | Morgan Stanley8774254  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000158211 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000158211 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000158211 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000158211 | Municipal Bond  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000158211 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
C000158211 | Asset-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 31.00%
C000158211 | Corporate Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 34.00%
C000022552 | U.S. Treasury Notes8776605  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000022552 | U.S. Treasury Notes8776612  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000022552 | U.S. Treasury Notes8776608  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000022552 | FHLMC Multifamily Structured Pass-Through Certificates8776321  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000022552 | FNMA REMIC8776530  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000022552 | GNMA8776874  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000022552 | FNMA REMIC8776577  
Holdings [Line Items]  
Percent of Total Investments 1.30%
C000022552 | FHLMC REMIC8776381  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000022552 | FHLMC REMIC8776479  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000022552 | FNMA REMIC8776258  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000022552 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000022552 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 22.10%
C000022552 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 71.80%
C000022552 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000147419 | U.S. Treasury Notes8776605  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000147419 | U.S. Treasury Notes8776612  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000147419 | U.S. Treasury Notes8776608  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000147419 | FHLMC Multifamily Structured Pass-Through Certificates8776321  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000147419 | FNMA REMIC8776530  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000147419 | GNMA8776874  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000147419 | FNMA REMIC8776577  
Holdings [Line Items]  
Percent of Total Investments 1.30%
C000147419 | FHLMC REMIC8776381  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000147419 | FHLMC REMIC8776479  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000147419 | FNMA REMIC8776258  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000147419 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000147419 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 22.10%
C000147419 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 71.80%
C000147419 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000022554 | GNMA8776809  
Holdings [Line Items]  
Percent of Total Investments 7.90%
C000022554 | GNMA8777033  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000022554 | GNMA8777022  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000022554 | GNMA8777024  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000022554 | GNMA8776970  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000022554 | GNMA8776894  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000022554 | GNMA8777038  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000022554 | GNMA8776864  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000022554 | GNMA8776938  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000022554 | GNMA8777062  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000022554 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000022554 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 98.50%
C000022554 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000147421 | GNMA8776809  
Holdings [Line Items]  
Percent of Total Investments 7.90%
C000147421 | GNMA8777033  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000147421 | GNMA8777022  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000147421 | GNMA8777024  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000147421 | GNMA8776970  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000147421 | GNMA8776894  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000147421 | GNMA8777038  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000147421 | GNMA8776864  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000147421 | GNMA8776938  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000147421 | GNMA8777062  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000147421 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000147421 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 98.50%
C000147421 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%